Among patients with severe CA (N = 355) symptoms of clinical and endogenous intoxication were recorded in 80% of the cases (N = 284), the presence of complications such as eustachitis, secretory otitis media--in 75% of the cases (N = 266).

In patients with moderate CA (N = 212) symptoms of clinical and endogenous intoxication were recorded in 50% of the cases (N = 106), the presence of complications such as eustachitis, secretory otitis media--in 10% of the cases (N = 21).

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